The explorer is running in 'regtest' mode. This saves disk space, but there is limited data.
The code for this application can be found at github.com/pdxrod/blockchain_explorer.

home    blocks

Enter a block height, e.g. 123, or the start of a bitcoin address, e.g. mxMfLjAez

Height: 1685
Hash: 3a28e443844c3fe1f3504305f019a710aadb8279c2ecc211ab3f71ce957942d7
Previous block: 3a664df9ce912c7b6222d5935212567139dcf90ab5f190073f6aa95219a306f0
Next block: 1809b64e30b59f001a7c274788c9073eee98718f7f34a4253febf3a7f191f11a
Weight: 908
Versionhex: 20000000
Version: 536870912
Transactions:
Time: 1719159204
Stripped size: 218
Size: 254
Nonce: 1
Merkle root: 3acfdb53bf03a3806b782f6f9ba9af4d5f50609e7adb72b86248aa5ed56c916e
Median time: 1719159203
Difficulty: 4.656542373906925e-10
Confirmations: 559
Chainwork: 0000000000000000000000000000000000000000000000000000000000000d2c
Bits: 207fffff